Trump moves up 51 spots Forbes Magazine's list of billionaires

US President Donald Trump has moved up 51 spots on Forbes magazine's list of the world's billionaires, with the magazine noting he only moved up because the fortunes of others declined.

The estimated size of the president's fortune, $A4.4 billion, remained the same, Forbes said on Tuesday as it released its annual ranking of the world's richest people for 2019. Trump is now ranked 715th.

According to Forbes, 994 billionaires, a record number, have lost money since the 2018 list was published. There are now 2153 billionaires in the world - 55 fewer than in 2018.

Donald Trump is still one of the wealthiest men in the world. (PA)

Kylie Jenner is a new addition to the list. (Instagram/@kyliejenner)

The top three on the list remain unchanged. The top spot went to Amazon chief executive Jeff Bezos with an estimated $A184 billion, while Microsoft co-founder Bill Gates took second place with $A135 billion and investment guru Warren Buffett was third with $A115 billion.

A noted newcomer to the list is Kylie Jenner, a 21-year-old reality TV star and whose makeup line helped her become the youngest on the list, ranking towards the bottom at No. 2057.

The total combined net worth of this year's billionaires declined to $A12.27 trillion, down from $A12.84 trillion in 2018.

It represents the first decrease in billionaires and their combined wealth since 2016, and only the second decrease in the past decade, Forbes said.

By country, the US leads other countries with the most billionaires (607), followed by China (324), Germany (114), India (106) and Russia (98).